Transparent spinel article and tape cast methods for making

Patent metadata

Field	Value
Publication number	US-9624136-B2
Application number	US-201514736935-A
Country	US
Kind code	B2
Filing date	Jun 11, 2015
Priority date	Jul 1, 2014
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A transparent, tape casted, spinel article, as defined herein. Also disclosed is a method of method of making the tape casted, transparent spinel, and laminates of the tape casted. transparent spinel, as defined herein.

First claim

What is claimed:

1. A transparent, tape casted, sintered spinel article, comprising:
at least one of:
a single layer thickness of 10 to 300 micrometers, or
a laminate comprising a plurality of laminated single layers, the laminate having a thickness of 50 micrometers to 10 millimeters;

the sintered spinel article having:
a transparency of 80% to 87%; and
a grain size of from 1 to 7 micrometers.

2. The spinel article of claim 1 wherein the article has a sintered strength of from 300 to 500 MPa.

3. The spinel article of claim 1 wherein the article has a Knoop hardness number measured with a 200 g load of from 10 to 16 GPa.

Assignees

• Corning Inc

Inventors

• Badding Michael Edward
• Miao Weiguo
• Zink Nathan Michael

Classifications

• C04B2237/704

  of one or more of the ceramic layers or articles · CPC title

• C04B2235/6567

  Treatment time · CPC title

• C04B2235/785

  Submicron sized grains, i.e. from 0,1 to 1 micron · CPC title

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B2235/72

  Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics · CPC title